Floor-jack.



PATENTE D OCT. 13, 1903.

M. NESHEIM.

FLOOR JACK.

APPLICATION FILED r1113. 26, 1903.

no MODEL.

J LarZznNashazm l2; Z=====i 61 Roz" 21a Patented October 13, 1903.

PATENT OFFICE.

MARTIN NESHEIM,VOF COUNCIL BLUFFS, IOWA.

FLiOOR-JAC K.

SPECIFICATION forming part of Letters Patent N o. 741,533, dated October 13, 1903.

Application filed February 26, 1903. Serial No. 145,274. (No model.)

adapted for use when laying-floors for tightening the flooring-boards to .close the cracksbetween them and to hold each board in place while laying and nailing it; and it consists in the peculiar construction and combination of devices hereinafter fully described and claimed.-- 7

The object of my invention is to provide an improved implement of this characterwhioh is exceedingly compact, simple, strong, and durable and Which'is adapted to be manufactured at slight cost.

In the accompanying drawings, Figure 1 is a side elevation of a floor-jack embodying my improvementsfshowing the same in operative position. Fig. 2 is a top plan view of the same. Fig. 3 is a transverse sectional view of the same, taken on a plane indicated by the line 2 2 of Fig. 2.

In the embodiment of my invention I provide a box or frame which comprises the side pieces 1, adapted to rest on opposite sides of the joist, and the cross-pieces 2, which connect the same together at their ends and at their upper sides, which cross-pieces2 are adapted to lie on the upper side of the joist while the implement is used in laying a floor, The said box or frame is provided with. a clamping-screw 3, which operates in a thread- -ed opening in one of the side pieces 1 and is adapted to engage one side of the joist to clamp the box or frame firmly thereto.

A longitudinally-disposed segment-bar 4 has its ends secured to the cross-pieces 2, and

the said segment-bar is provided on its upper side with notches 5. On the upperside of the box or frame 1 are guides 6, in which are said block is adapted to bear against'the flooring and is provided at one side with a centrally-disposed opening 11 of sufiicient size to enable the fiooringto be nailed to the joist. The said slide-rods, yoke, and head constitute a longitudinally-movable element,

and the same is operated by a lever -12,. which is here shown as having its lower portion forked, as at 13, to bear on opposite sides of the box or frame 1 and as. connected to the longitudinallymovable element by a bolt-rod l4 and as connected to the outer sides of the box or frame 1 by links.15, the latter being box or frame and to the lower forked ends of the lever. The. latter is further provided with a spring-pressed locking-dog 16 to engage the notches 5 of the segment-banand thereby secure said lever at anydesired position, and a thumb-piece 17 is also provided, which is carried by the said lever and is connected to the dog 16, as by a rod 18, the said thumb-piece enabling the dog to be readily disengaged from the segment-bar when the lever is to be operated. From the foregoing description, taken in connection with the accompanying drawings, the construction and operation of the inven-' tion will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion,

and the minor details of construction may be resorted to-without departing from the principle or sacrificing any of the advantages of this invention.

7 Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

In a floor-jack, the combination of aframe adapted to be secured on a joist and provided with a segment-bar, a longitudinally-movable element carried by said frame and having a head, a lever connected to said longitudi- Dally-movable element, adapted to operate my hand in presence of two subscribing witthe same, and having means to engage the nesses.

segment-bar and coact therewith to lock the 7 lever at. any desired adjustment, and links MARTIN NESHEIM' pivotally connected to said frame and said le- I ver, substantially as described.

Witnesses:

HENRY W. ROTHERT,

In testimony whereof I have hereunto set J. SOI-IUYLER LONG. 

